<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* div {
            width: 200px;
            height: 100px;
            padding-left: 5px;
            padding-right: 5px;
            padding-top: 5px;
            padding-bottom: 5px;
        } */

        div{
            border:solid green 5px;
            margin: 5px;
        }
        
    </style>
</head>
<body>
    <!-- <div>this is test</div> -->
    <div></div>
    <div></div>
    <div></div>
</body>
</html>